Wish for a realistic automatic transmission that starts to roll the car when releasing the brake and shifts adequately according to throttle response.
And of course the ability to shift with flappy paddles if avalible.
Also sequential manual gearboxes with clutch.
and something like realistic gearbox in difficulty settings so you dont have to manually change gearbox type in difficulty settings when you change vehicle
Well, -1 from me for automatic. This is not beam.ng ; this is pure racing arcade-sim game. As automatic gear setting doesn’t alter shifting points by gas input and is worse than manual when racing, i find it unnecessary.
BUT, A BIG BUT… For those avid hardcore racers out there who want to use clutch with H-shifter , I find this gamebreaker: Even at w/clutch setting, if the car has paddleshifter or clutchless shifter with tuning or as original, game SHOULDN’T FORCE PLAYER TO USE CLUTCH STILL.
I want this too. They could call it sim no clutch, sim with clutch and have higher rewards than the regular gearboxes. Sim would have P-R-N-D-S instead of 1-2-3-4-5,…-R for automatics and regular 1-6 for manuals.
Biggest thing I’d like to see from a more realistic manual transmission is the ability to stall out, or damage your transmission & clutch! Seems silly to be able to go from 6th gear 100mph down to 1st and have no damage, or stalling. Wouldn’t be hard to add a stall function and make the throttle button not work for a few seconds until the car is started back up 
There should be a setting for transmission that automatically changes between H shifter w/ clutch and paddles depending on what the car is equipped with. Driving a GT car or LMP car with an H pattern shifter just feels wrong.
Good news if you drive cars with racing gearboxes, you got that exactly, you can change gears without pushing the clutch because those cars that have a race gearbox have automatic clutch when changing gears.
yes would love to have this ingame , but think its more something we need in FH5